Germany, Dec. 5 -- A Swiss national has been indicted for allegedly blackmailing BMW heiress Susanne Klatten, Germany's richest woman, officials said.

The heiress filed charges against her former lover, Helg Sgarbi, in January, Munich state prosecution spokesman Anton Winkler said. Sgarbi has allegedly also blackmailed other wealthy German, Austrian and Swiss women, ABC reported Friday.

Klatten and Sgarbi reportedly had an affair for about 2 months in 2007, during which time Sgarbi persuaded Klatten to pay almost $10 million by telling her that he had a tragic car accident that involved the child of a mafia boss who was demanding money.

He allegedly threatened to publish photos taken during their tryst if Klatten did not pay more.

Sgarbi has been in Munich's Stadelheim jail since January where he is awaiting trial. (UPI)